原子的TCR-连接体相互作用指导记忆T细胞分化
Aoi Akitsu1,2,3, Kemin Tan4, Robert J Mallis1,2,3,5
1Laboratory of Immunobiology, Dana-Farber Cancer Institute; Boston, MA 02115, USA.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
记忆T细胞提供适应性免疫力. 这项研究揭示了T细胞受体 (TCR) 信号偏差如何决定CD8+ T细胞是否成为中央 (TCM) 或效应器 (TEM) 记忆细胞,从而影响病原体反应.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 记忆T细胞对于适应性免疫至关重要,能够迅速保护人免受再感染和癌症.
- 规范原始CD8+T细胞分化成不同的记忆子集 (TCM和TEM) 的分子机制仍然不完全理解.
研究的目的:
- 阐明CD8+T细胞记忆命运决定的分子基础.
- 为了研究T细胞受体 (TCR) 信号极性和分裂成中央记忆 (TCM) 和效应器记忆 (TEM) T细胞子集之间的关系.
主要方法:
- 单细胞转录组与242个小鼠CD8+ TCRαβ克隆类型的TCR测序对A型流感病毒 (IAV) 表位特异.
- 生物物理测量取决于力量的TCR-pMHC相互作用.
- 在体内记忆发展研究和结构分析.
主要成果:
- 显著的TCR子单元参与偏差与记忆命运相关:TCRβ驱动的参与偏好TCM,而TCRα驱动的参与偏好TEM.
- 双极性克隆类型 (TBP) 显示出平衡的信号传输,更大的扩张和更广泛的交叉反应.
- 与TCM相关的TCR序列在识别IAV突变方面具有更大的潜力,这表明了补充的交叉反应策略.
结论:
- TCR的多样性预测了病原体的进化,而不同的TCR信号通路调节了记忆T细胞的命运.
- 了解这些机制对于开发有效的采用性T细胞免疫疗法具有重要意义.
- 在原子水平上微调的TCR-连接体相互作用调节机械信号,影响T细胞记忆的发展和功能.
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